Wu, E.Y.S. and Ade, P.A.R. and Bock, J.J. and Bowden, M. and Brown, M.L. and Cahill, G. and Castro, P.G. and Church, S. and Culverhouse, T. and Friedman, R.B. and Ganga, K. and Gear, W.K. and Gupta, S. and Hinderks, J. and Kovac, J. and Lange, A.E. and Leitch, E. and Melhuish, S.J. and Memari, Y. and Murphy, J.Anthony and Orlando, A. and Piccirillo, L. and Pryke, C. and Rajguru, N. and Rusholme, B. and Schwarz, R. and O'Sullivan, Créidhe and Taylor, A.N. and Thompson, K.L. and Turner, A.H. and Zemcov, M. (2009) Parity Violation Constraints Using Cosmic Microwave Background Polarization Spectra from 2006 and 2007 Observations by the QUaD Polarimeter. Physical Review Letters, 102. 161302.1-161302.4. ISSN 1079-7114

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Abstract

We constrain parity-violating interactions to the surface of last scattering using spectra from the QUaD experiment’s second and third seasons of observations by searching for a possible systematic rotation of the polarization directions of cosmic microwave background photons. We measure the rotation angle due to such a possible “cosmological birefringence” to be 0.55°±0.82° (random) ±0.5° (systematic) using QUaD’s 100 and 150 GHz temperature-curl and gradient-curl spectra over the spectra over the multipole range 200<ℓ<2000, consistent with null, and constrain Lorentz-violating interactions to <2×10-43  GeV (68% confidence limit). This is the best constraint to date on electrodynamic parity violation on cosmological scales.

Item Type:	Article
Keywords:	Parity Violation Constraints; Cosmic Microwave Background Polarization Spectra; QUaD Polarimeter;
Academic Unit:	Faculty of Science and Engineering > Experimental Physics
Item ID:	2109
Depositing User:	Dr. Anthony Murphy
Date Deposited:	07 Sep 2010 15:54
Journal or Publication Title:	Physical Review Letters
Publisher:	American Physical Society
Refereed:	Yes
URI:	http://prl.aps.org/
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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